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PatchSiren cyber security CVE debrief

CVE-2023-6378 Siemens CVE debrief

A serialization vulnerability in the logback receiver component (version 1.4.11) allows remote attackers to cause a Denial-of-Service condition by sending crafted data. The vulnerability affects Siemens SINEC NMS, an industrial network management system. With a CVSS 3.1 score of 7.5 (HIGH), this vulnerability is network-exploitable with low attack complexity, requiring no privileges or user interaction. The attack vector is particularly concerning for OT/ICS environments where availability is critical. Siemens has released a vendor fix in version 3.0 or later.

Vendor
Siemens
Product
SINEC NMS
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2025-08-26
Original CVE updated
2025-08-26
Advisory published
2025-08-26
Advisory updated
2025-08-26

Who should care

Organizations operating Siemens SINEC NMS for industrial network management, particularly in critical infrastructure sectors. Security teams responsible for OT/ICS environments using Java-based logging infrastructure. Asset owners should prioritize patching due to the network-exploitable nature and high availability impact of this vulnerability.

Technical summary

The vulnerability exists in the logback receiver component version 1.4.11, a Java logging framework. The receiver component's deserialization of untrusted data allows attackers to send 'poisoned data' that triggers a Denial-of-Service condition. In Siemens SINEC NMS deployments, this could disrupt network management operations. The attack requires network access to the logback receiver but no authentication. The vulnerability is rated HIGH severity (CVSS 7.5) due to the potential for complete availability impact on affected systems. Siemens has addressed this in SINEC NMS V3.0 and later.

Defensive priority

HIGH

Recommended defensive actions

  • Update Siemens SINEC NMS to version 3.0 or later per vendor guidance
  • Review network segmentation for SINEC NMS deployments to limit exposure of logback receiver components
  • Monitor for anomalous network traffic targeting logging infrastructure
  • Apply CISA ICS recommended practices for defense-in-depth in industrial control environments
  • Verify logback component versions in dependent applications and update where vendor fixes are available

Evidence notes

The vulnerability description is sourced from CISA CSAF advisory ICSA-24-228-06, which references Siemens security advisory SSA-784301. The CVSS vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C) confirms network attack vector with no privileges required and high availability impact. The remediation guidance specifies update to V3.0 or later.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-6378 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-6378

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2023-6378 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-6378

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2024/icsa-24-228-06.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-784301.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-784301.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-24-228-06

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.